The Fine-Grained Structure in Magnesium Alloy Containing Long-Period Stacking Order Phase

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Microstructural characteristics of warm-extruded magnesium alloy (Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB>) containing long-period stacking order (LPSO) phase has been investigated using SEM and TEM as the first step to understand the effect of warm-extrusion on its mechanical property. Particular attention has been paid on the microstructural change in the hcp matrix caused by warm extrusion.<BR>The microstructure developed by the warm extrusion at 623 K consists of elongated grains with fine-lamellae of LPSO phase and fine-grained matrix of hcp phase. The grain size of the hcp matrix observed on the cross section perpendicular to the extruding direction was about 1 μm, indicating that remarkable grain refinement was occurred during the extrusion since the grain size of as-cast alloy was around 0.5 mm. Those fine grains in the extruded alloy included abundant stacking faults, and HAADF-STEM observation revealed that the stacking faults were enriched by Zn and Y. In addition, grain boundaries were also enriched by those solute elements, which must contribute to stabilizing such fine-grained structure.

収録刊行物

  • Materials transactions  

    Materials transactions 49(6), 1294-1297, 2008-06-01 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10021147436
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    9519144
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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